public double getCurrClientBalance(String contract_title)
   {
      double curBalance = 0.0;
         try
         {
            ContractManager cm = new ContractManager(getConnection());
            BalanceUtils contr_balabce = new BalanceUtils(getConnection());
            Date date = new Date();

            curBalance = contr_balabce.getBalance(date, cm.getContractByTitle(contract_title).getId()).doubleValue();;
         
            return curBalance; // возврат текущего баланса договора
         } catch (Exception e)
         {
            e.printStackTrace();
            return -2.0; // не удалось считать баланс договора
         }
   }

java.lang.NullPointerException    at ru.bitel.bgbilling.kernel.container.service.server.AbstractService.getConnection(AbstractService.java:107)    at api.ru.customservice.bgbilling.service.impl.PortalServiceImpl.getCurrClientBalance(PortalServiceImpl.java:137)    at test_class.execute(test_class.java:33)    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)    at java.lang.reflect.Method.invoke(Method.java:597)    at ru.bitel.bgbilling.kernel.dynamic.server.DynamicCodeServiceImpl.run(DynamicCodeServiceImpl.java:329)    at sun.reflect.GeneratedMethodAccessor380.invoke(Unknown Source)    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)    at java.lang.reflect.Method.invoke(Method.java:597)    at ru.bitel.bgbilling.kernel.container.service.server.ServiceInfo.invoke(ServiceInfo.java:102)    at ru.bitel.bgbilling.kernel.container.ws.server.AbstractJaxWsHandler.invoke(AbstractJaxWsHandler.java:192)    at ru.bitel.bgbilling.kernel.container.ws.server.JaxWsHandler.access$1(JaxWsHandler.java:1)    at ru.bitel.bgbilling.kernel.container.ws.server.JaxWsHandler$2.run(JaxWsHandler.java:309)    at java.security.AccessController.doPrivileged(Native Method)    at javax.security.auth.Subject.doAs(Subject.java:396)    at ru.bitel.bgbilling.kernel.container.ws.server.JaxWsHandler.invoke(JaxWsHandler.java:303)    at ru.bitel.bgbilling.kernel.container.ws.server.AbstractJaxWsHandler$ServiceInstanceResolver$1.invoke(AbstractJaxWsHandler.java:304)    at com.sun.xml.ws.server.InvokerTube$2.invoke(InvokerTube.java:150)    at com.sun.xml.ws.server.sei.EndpointMethodHandler.invoke(EndpointMethodHandler.java:261)    at com.sun.xml.ws.server.sei.SEIInvokerTube.processRequest(SEIInvokerTube.java:100)    at com.sun.xml.ws.api.pipe.Fiber.__doRun(Fiber.java:641)    at com.sun.xml.ws.api.pipe.Fiber._doRun(Fiber.java:600)    at com.sun.xml.ws.api.pipe.Fiber.doRun(Fiber.java:585)    at com.sun.xml.ws.api.pipe.Fiber.runSync(Fiber.java:482)    at com.sun.xml.ws.server.WSEndpointImpl$2.process(WSEndpointImpl.java:314)    at com.sun.xml.ws.transport.http.HttpAdapter$HttpToolkit.handle(HttpAdapter.java:608)    at com.sun.xml.ws.transport.http.HttpAdapter.handle(HttpAdapter.java:259)    at com.sun.xml.ws.transport.http.servlet.ServletAdapter.handle(ServletAdapter.java:162)    at ru.bitel.common.server.JaxWSAdapter.handle(JaxWSAdapter.java:374)    at bitel.billing.server.Executer.doPost(Unknown Source)    at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)    at bitel.billing.server.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:48)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:563)    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:403)    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:301)    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:162)    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)    at java.lang.Thread.run(Thread.java:662)